本文从等效电路着眼,叙述了几种常用功率耦合装置的工作原理,并给出了设计公式,还提出了把辐射波导、耦合波导看成“腔体”的条件。对试件的测试结果表明,理论值与实际值很吻合。所得结论对平板裂缝天线的工程设计十分有用。 This paper focuses on the equivalent circuit, describes the working principle of several commonly used power coupling devices, and gives the design formula, but also put the radiation waveguide, coupled waveguide as a “cavity” conditions. Test results on the specimen show that the theoretical value is in good agreement with the actual value. The conclusion is very useful for the engineering design of flat crack antenna.